Yellow lines separate:
- Traffic lanes on one-way streets.
- Traffic moving in opposite directions on two-way roads. ✓
- All carpool lanes from regular traffic lanes.
Answer: B. Traffic moving in opposite directions on two-way roads.
Yellow lines separate traffic moving in opposite directions on two-way roads.
Why this is the answer
The handbook's pavement marking chapter states plainly that lines dividing traffic moving in the same direction are white, while lines dividing traffic moving in opposite directions are yellow. That color rule is how you tell at a glance whether the lane next to you is coming toward you or going the same way. The manual also notes there may be two lines between lanes and that they can be solid or broken, so the yellow color is the direction clue, not the passing rule itself.
Why the other answers are wrong
- A. Traffic lanes on one-way streets. — Lanes on a one-way street all carry traffic the same way, and the manual assigns white to lines separating traffic moving in the same direction.
- C. All carpool lanes from regular traffic lanes. — The passages say nothing about carpool lanes being marked off with yellow lines; yellow is described only in terms of opposite-direction traffic.
Remember it
Yellow means oncoming: if the line beside you is yellow, the traffic over there is coming at you.